If you are using the FRITZ!VPN, a smartphone, or another VPN client to establish the VPN connection, you can always re-establish the connection manually, for example by clicking the "Establish" button in FRITZ!VPN.

With VPN connections between two FRITZ!Boxes (LAN-LAN linkup), the connection is automatically established as soon as one of the networks accesses the other network. Configure the following settings in both of the FRITZ!Boxes if the VPN connection should be maintained and automatically re-established if it is terminated:

Enter the password required to establish the VPN connection in the field "VPN password (pre-shared key)".

Enable the option "Hold VPN connection permanently".

Click "OK" to save the settings.

2 Error occurs continuously

If the VPN connection cannot be established, then the issue is being caused by an error in the VPN settings. This type of error usually occurs right after you configure the VPN connection or edit the VPN configurations files. Reconfigure the VPN connection to resolve this type of error:

Delete the VPN connection in the FRITZ!Box or both of the FRITZ!Boxes.